Hampstead Architecture and Planning

Haringey

Kitchen Extension Architects in Wood Green

On a designated estate the question is not how much extension you may have but what shape it has to be, and the answer has a name in planning language: subordinate. That word does specific work, and understanding what it actually requires is the difference between a scheme that is approved as drawn and one that spends three months being reduced.

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The short answer

What shape should a Wood Green estate extension be?

Subordinate, which is a compositional requirement rather than a size limit: a roof below the original eaves, set in from a boundary, a simple form, a depth matched to the group, and detailing of its own time rather than a replica. And design the plan you want before deciding how much extension it needs — on these houses the inefficiency in the original layout is usually larger than the depth being argued over.

Planning at a glance

Wood Green

Planning at a glance in Wood Green
Local planning authorityHaringey
Likely approval routeHouseholder planning application or permitted development, depending on conservation status, listing and property type — confirmed for the exact address before drawings begin
Statutory determination time8 weeks for most householder applications (13 weeks for major applications)
Where most projects startPlanning Route Review — £395 inc. VAT, credited in full against your package if you proceed. Find my package →

Subordination is a compositional requirement rather than a size limit, and it is judged on four things. Height: the new roof should sit below the original eaves so the host roof form is uninterrupted and still reads as the principal element. Position: setting in from one or both boundaries, where the plot allows, keeps the original rear elevation legible at its edges. Form: a simple mono-pitch or flat roof with a modest parapet is easier to support than a complicated roofscape competing with the original. Depth: matched to what the group has already established rather than to what the GPDO would have permitted elsewhere.

Materials are the decision most often taken by default and most worth taking deliberately. An approximate brick match reads as a failed imitation and draws attention to itself; either a brick chosen carefully to sit quietly with the original, or a frankly contemporary material used with restraint, will sit better. The same applies to the glazing: large modern openings at the rear are generally acceptable on these estates, provided the frames are slim and the opening is a clear intervention rather than a pastiche of a period window at four times the size.

Because the depth is constrained, the plan has to work harder, and that is usually to the good. On a house with a small original footprint, the greatest gains often come from reorganising rather than adding — moving the kitchen to the brighter side of the plan, removing a partition that serves no purpose, taking a chimney breast out to gain a usable wall, or bringing the stair into a proper hall. Those moves cost a fraction of an extension and on an estate house they are frequently what makes the difference.

The servicing is the same as anywhere and should not be left to the end. Part F requires mechanical extract at a defined rate for a kitchen and a recirculating hood does not meet it, so a duct has to reach an external face and its route must clear the new structure. Daylight has to be put back into the middle of the plan once the back of the house has moved, which means rooflights over the working part of the kitchen rather than over circulation, and a rear opening that is tall rather than merely wide.

Local analysis

What matters in Wood Green

What “subordinate” means when an officer uses the word

Subordinate is one of those planning words that sounds like a matter of taste and is in fact reasonably precise. It means the addition should be legible as secondary to the host building — you should be able to look at the back of the house and see, without effort, which part is the original and which is the addition, with the original clearly the dominant element. Four measurable things produce that result. Height is the most important: where the new roof sits below the original eaves line, the host roof form runs uninterrupted and the addition reads as attached to the building rather than as part of it. Where the new roof rises to or above the eaves, that reading is lost immediately, whatever the materials. Position matters next: an extension set in from one or both party boundaries leaves a fragment of the original rear elevation visible at the edges, which keeps the original geometry readable; one built hard to both boundaries across the full width replaces the rear elevation entirely. Form is the third: a simple mono-pitch, or a flat roof with a modest parapet, does not compete; a complicated roofscape with multiple pitches, gables or a lantern breaking the ridge line does. Depth is the fourth, and on an estate it is judged against what the group has already established rather than against a national allowance. There is a fifth, unmeasurable one that matters just as much in practice: the addition should be of its own time. A rear extension detailed as a replica of a Victorian rear wing, with matching brick, matching arches and a pastiche of the original windows at a larger scale, competes directly with the thing the designation protects, and officers on planned estates consistently prefer an honest, quiet contemporary addition to an approximate historical one. Designing to those five points from the outset is what produces a scheme approved as drawn.

Getting more from the plan than from the footprint

On a house with a small original footprint and a constrained rear allowance, the instinct is to fight for every extra square metre of extension, and it is frequently the wrong fight. These houses were planned for a way of living that no longer applies — a front parlour kept for visitors, a separate scullery, a narrow hall taking a quarter of the ground floor width — and the inefficiency in that plan is often larger than the extension being argued over. Four moves recur, all cheaper than building. Relocating the kitchen to the brighter part of the ground floor, which on many of these houses means putting it where the parlour was and the sitting room where the kitchen was, transforms how the level works without adding a metre. Removing a chimney breast at ground floor — a designed operation, with the stack above properly supported — releases a wall that can take a full run of units and frequently gains more usable space than a metre of depth would. Opening the closet wing into the main room, where one exists, joins two poorly proportioned spaces into one good one. And re-thinking the hall, which on a small terrace often serves only to get people to a stair they could reach another way, can release enough width to change the entire ground floor. The discipline that makes this work is to design the plan you actually want first, and only then ask how much extension it requires. Owners who start with the extension usually end up with the same inefficient plan, extended. Owners who start with the plan frequently find they need less depth than they feared — which on a designated estate is not merely cheaper but materially more likely to be approved, because a modest, subordinate addition matched to the group is exactly what the policy is asking for.

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Local planning

Planning & conservation context

Inside a conservation area the Class A rear extension allowance is reduced and the prior approval procedure for a deeper single-storey extension is unavailable, so extra depth is argued in a householder application rather than notified.

Outside the designations much of Wood Green retains both routes, and prior approval permits a materially deeper single-storey rear extension in exchange for notifying the adjoining neighbours.

The allowances are measured against the original house — as first built or as it stood in 1948 — so an addition by a previous owner permanently reduces what remains. On an estate built to repeated classes, the original form is legible from the unaltered neighbours.

What is protected on these estates is the coherence of a group built to defined classes, so an addition is assessed on whether the host house still reads as one of that set when seen from surrounding gardens and any public vantage point.

Subordination is the operative test: lower than the original eaves, set in from the boundaries where the plot allows, simpler in form than the host, and no wider or deeper than the pattern the group has established.

Retaining part of the original rear elevation, so the addition reads as an addition rather than as a replacement of the back of the house, is one of the more reliable ways to satisfy that test.

For the wider local-authority picture — policies, timescales and application routes — see planning in Haringey.

Illustrative study — street elevation

Services

Architectural services in Wood Green

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Architecture in Wood Green: FAQs

How deep can I extend a Wood Green estate house?

Inside a conservation area the Class A allowance is reduced and prior approval is unavailable, so the depth is argued in a householder application against what the group has already established — not against a national allowance. Outside the designations both routes remain open, and prior approval permits a materially deeper single-storey rear extension on neighbour notification.

What does subordinate actually mean?

That the addition reads as secondary to the host. In practice: a roof below the original eaves so the host roof form is uninterrupted; set in from one or both boundaries so the original rear elevation stays legible at its edges; a simple form rather than a competing roofscape; a depth matched to the group; and detailing of its own time rather than a replica.

Should the extension match the original brick?

Either match it carefully or do not attempt to. An approximate match reads as a failed imitation and draws attention to itself, whereas a brick chosen deliberately to sit quietly, or a frankly contemporary material used with restraint, sits better. The same applies to glazing: slim modern frames are generally acceptable; a period window reproduced at four times the size is not.

Can I have a roof lantern?

Rooflights are usually straightforward; a large lantern that breaks the simple form of the addition is harder, because it makes the extension compete rather than recede. On a constrained plan, flush rooflights placed over the working part of the kitchen do more for the room than a lantern over circulation does, and they are considerably easier to support on a designated estate.

Is there an alternative to extending?

Frequently a better one. Relocating the kitchen to the brighter part of the ground floor, removing a chimney breast to release a full run of units, opening the closet wing into the main room, or re-thinking a hall that serves little purpose can each change how the level works for a fraction of the cost — and they often reduce how much depth the extension needs.

Does a previous owner’s extension count against me?

Yes, permanently. The allowances are measured against the original house — as first built or as it stood in 1948 — so anything added since counts against what remains. On an estate built to repeated classes this is easy to establish, because the unaltered neighbours show exactly what the original was.

What about the extractor?

Part F requires mechanical extract at a defined rate for a kitchen and a recirculating hood does not meet it, so a duct has to reach an external face and its route must clear the new structure. On a small estate house the run is short but the options are few, so it is worth resolving before the layout is fixed rather than after the hood is chosen.

What does a kitchen extension architect in Wood Green charge?

We publish fixed-fee packages rather than quoting a percentage before seeing the house, starting with a route review credited against the design work if you proceed. On a designated estate that review establishes the rear building line the group has set and tests how much of your brief can be met by reorganising rather than adding.

How much does a kitchen extension cost in Wood Green?

Fees for kitchen extensions in Wood Green follow scope, consent complexity and whether freeholder or specialist input is required. Published packages start from a fixed fee once scope is clear; council, engineer and freeholder surveyor fees are usually separate. See our packages page for current fixed-fee bands — we confirm a fee only after the address and proposed work are understood.

Discuss a kitchen extension in Wood Green

Send your Wood Green address, photographs of the rear elevation and a plan of the ground floor if you have one. We will establish the rear building line the group has set, test how much of your brief the existing plan can absorb, and design an addition shaped to be approved as drawn.

Book an Architectural ConsultationEstimate the feesor call 020 8054 8756
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